Class SwitchRetrofittingTaskListener2

java.lang.Object

com.github.bsideup.jabel.SwitchRetrofittingTaskListener2

All Implemented Interfaces:

TaskListener

public class SwitchRetrofittingTaskListener2
extends Object
implements TaskListener

Replaces

invalid reference

SwitchBootstraps#typeSwitch

and

invalid reference

SwitchBootstraps#enumSwitch

by a ternary chains.

Another method to adapt switches, by letting the compiler doing it's job, and adapting the condition according to the switch restart behavior.

This is not very efficient because SwitchBootstraps will generate a method that uses another switch to easily restart at the next case.
In fact, it's better to rewrite entirely the switch, because this "restart" behavior is poorly designed.
And can be better, avoiding any kind of "restart" system and dynamic method generation, just by adding a little more bytecode at compilation, as shown in SwitchRetrofittingTaskListener.

Also this implementation is very sensitive, as it needs to unwrap PoolConstant.LoadableConstants, that can be implemented a lot of ways.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
class	SwitchRetrofittingTaskListener2.SwitchFixer

Constructor Summary

Constructors

Constructor	Description
SwitchRetrofittingTaskListener2(com.sun.tools.javac.util.Context context)

Method Summary

Modifier and Type	Method	Description
com.sun.tools.javac.tree.JCTree.JCExpression	buildArgCondition(com.sun.tools.javac.tree.JCTree.JCExpression sel, Object arg, com.sun.tools.javac.code.Type enumType)
void	finished(TaskEvent e)
void	injectSwitchBootstraps()	Registers virtual symbol of missing types to make the compiler happy.
com.sun.tools.javac.tree.JCTree.JCExpression	replaceSwitchSelector(com.sun.tools.javac.tree.JCTree.JCExpression selector)
void	started(TaskEvent e)

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

SwitchRetrofittingTaskListener2

public SwitchRetrofittingTaskListener2(com.sun.tools.javac.util.Context context)

Method Details

started

public void started(TaskEvent e)

Specified by:

started in interface TaskListener

finished

public void finished(TaskEvent e)

Specified by:

finished in interface TaskListener

injectSwitchBootstraps

public void injectSwitchBootstraps()

Registers virtual symbol of missing types to make the compiler happy.

replaceSwitchSelector

public com.sun.tools.javac.tree.JCTree.JCExpression replaceSwitchSelector(com.sun.tools.javac.tree.JCTree.JCExpression selector)

Returns:

the ternary-chain replacement if selector is a typeSwitch or enumSwitch dynamic invocation; otherwise null.

buildArgCondition

public com.sun.tools.javac.tree.JCTree.JCExpression buildArgCondition(com.sun.tools.javac.tree.JCTree.JCExpression sel,
 Object arg,
 com.sun.tools.javac.code.Type enumType)